MaxMind databases are the first options you can find if you search for "GeoIP Download" [1][2][3][4][5].

[1] https://www.google.com/search?q=geoip+download

[2] https://dev.maxmind.com/geoip/legacy/geolite/

[3] https://dev.maxmind.com/geoip/legacy/downloadable/

[4] https://dev.maxmind.com/geoip/geoip2/geolite2/

[5] https://dev.maxmind.com/geoip/geoip2/downloadable/

Good question!